Flight number record

DL 528

Delta Air Lines · Los Angeles to Atlanta

Route: LAX → ATL
Departs: 11:05
Flights: 304
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s DL 528, check with Delta Air Lines.

DL 528 lands a B+, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 304 flights, with a median arrival 5 minutes early.

Set against the rest of the country, DL 528's record is 5 points better than the US average of 77.6%. That gap is worth roughly 45 fewer late arrivals for every thousand flights.

On time

82.1%

Arrivals under 15 minutes late, of 302 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

6.0%

National rate is 8.1%

These figures cover 304 flights between July 2025 and June 2026. The median arrival is 5 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When DL 528 flies

DL 528 flies LAX to ATL without a single fixed slot. Its most common scheduled departure was 11:05, used on 84 of 304 flights, with 11:10 (62 flights) and 10:50 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 11:0584 flights27.6%
Departs 11:1062 flights20.4%
Departs 10:5035 flights11.5%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 11:05 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and DL 528 runs 3 points better at 82.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

DL 528 next to LAX to ATL

Every carrier on LAX to ATL combined arrived on time 78.4% of the time across 5,013 flights, so DL 528 is 4 points ahead of it. Delta flew 3,844 flights on the same city pair under all its flight numbers, including this one, and those ran 81.5% on time. Across its whole network Delta Air Lines managed 81.6%, close to this flight's figure.

DL 528 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
DL 528thin sample	304	82.1%	69 min	0.00%	B+
All Delta Air Lines on LAX–ATL	3,844	81.5%	64 min	0.86%	B+
All carriers on LAX–ATL	5,013	78.4%	67 min	0.92%	B+
Delta Air Lines, whole network	1,038,570	81.6%	71 min	1.62%	B

Across the year

DL 528 quarter by quarter

DL 528 did not run the same all year. Its best quarter was Apr–Jun 2026 at 85.6% on time and its weakest Jan–Mar 2026 at 71.9%, a swing of 14 points on roughly 76 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202592 flights84.6%
Oct–Dec 202590 flights79.8%
Jan–Mar 202632 flights71.9%
Apr–Jun 202690 flights85.6%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, DL 528 did best on Wednesday at 90.5% on time and worst on Sunday at 75.0%. Each day rests on about 43 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why DL 528 runs late

One category carries most of the weight here. Carrier accounts for 56% of the 3,727 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
56%
Late-arriving aircraft
29%
National Airspace System
14%
Extreme weather
1%

The largest share of delay minutes, 56%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,085 of the 3,727 delay minutes reported here. The split is drawn from 3,727 delay minutes reported on DL 528.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

6.0% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

At 1,947 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The same number turns up on two other city pairs in the data, including BZN to ATL (17) and ATL to BZN (17), but none flew often enough under DL 528 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to ATL only.

One caution: this is a thin sample. 304 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking DL 528

For a booking, read DL 528 as 82.1% on time with 0.00% cancelled over 304 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

A flight number here means Delta Air Lines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures